skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Structural Insights into Separase Architecture and Substrate Recognition through Computational Modelling of Caspase-Like and Death Domains

Journal Article · · PLoS Computational Biology (Online)
 [1];  [1];  [1];  [2]
  1. Univ. of Leicester (United Kingdom)
  2. Wake Forest Univ., Winston-Salem, NC (United States)

Separases are large proteins that mediate sister chromatid disjunction in all eukaryotes. They belong to clan CD of cysteine peptidases and contain a well-conserved C-terminal catalytic protease domain similar to caspases and gingipains. However, unlike other well-characterized groups of clan CD peptidases, there are no high-resolution structures of separases and the details of their regulation and substrate recognition are poorly understood. Here we undertook an in-depth bioinformatical analysis of separases from different species with respect to their similarity in amino acid sequence and protein fold in comparison to caspases, MALT-1 proteins (mucosa-associated lymphoidtissue lymphoma translocation protein 1) and gingipain-R. A comparative model of the single C-terminal caspase-like domain in separase from C. elegans suggests similar binding modes of substrate peptides between these protein subfamilies, and enables differences in substrate specificity of separase proteins to be rationalised. We also modelled a newly identified putative death domain, located N-terminal to the caspase-like domain. The surface features of this domain identify potential sites of protein-protein interactions. Notably, we identified a novel conserved region with the consensus sequence WWxxRxxLD predicted to be exposed on the surface of the death domain, which we termed the WR motif. We envisage that findings from our study will guide structural and functional studies of this important protein family.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Cancer Research UK
Grant/Contract Number:
C24461/A12772
OSTI ID:
1233331
Journal Information:
PLoS Computational Biology (Online), Vol. 11, Issue 10; ISSN 1553-7358
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

References (64)

The InterPro protein families database: the classification resource after 15 years journal November 2014
Crystal Structure of an Invertebrate Caspase journal November 2003
NMR structure and mutagenesis of the Fas (APO-1/CD95) death domain journal December 1996
Characterization of fission yeast cohesin: essential anaphase proteolysis of Rad21 phosphorylated in the S phase journal November 2000
Classification of the caspase-hemoglobinase fold: Detection of new families and implications for the origin of the eukaryotic separins journal February 2002
Evolution of protein structures and functions journal June 2002
CLUSTAL W: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice journal January 1994
Specificity of a protein-protein interface: Local dynamics direct substrate recognition of effector caspases: Local Dynamics Direct Specificity of Caspases journal October 2013
Cohesins: Chromosomal Proteins that Prevent Premature Separation of Sister Chromatids journal October 1997
PROCHECK: a program to check the stereochemical quality of protein structures journal April 1993
Separase Is Recruited to Mitotic Chromosomes to Dissolve Sister Chromatid Cohesion in a DNA-Dependent Manner journal April 2009
Rec8 Phosphorylation by Casein Kinase 1 and Cdc7-Dbf4 Kinase Regulates Cohesin Cleavage by Separase during Meiosis journal March 2010
GROMACS 4.5: a high-throughput and highly parallel open source molecular simulation toolkit journal February 2013
Disseminating the Genome: Joining, Resolving, and Separating Sister Chromatids During Mitosis and Meiosis journal December 2001
Insights into Programmed Cell Death through Structural Biology journal October 2000
Substrate Specificities of Caspase Family Proteases journal April 1997
Comparative structural analysis of the caspase family with other clan CD cysteine peptidases journal February 2015
Overexpression of Separase induces aneuploidy and mammary tumorigenesis journal August 2008
Cut2 proteolysis required for sister-chromatid separation in fission yeast journal May 1996
A common allosteric site and mechanism in caspases journal May 2006
Processing, localization, and requirement of human separase for normal anaphase progression journal April 2003
Overexpression and constitutive nuclear localization of cohesin protease Separase protein correlates with high incidence of relapse and reduced overall survival in glioblastoma multiforme journal May 2014
Highly Sensitive Detection of Individual HEAT and ARM Repeats with HHpred and COACH journal September 2009
Cut1 is loaded onto the spindle by binding to Cut2 and promotes anaphase spindle movement upon Cut2 proteolysis journal May 1998
WebLogo: A Sequence Logo Generator journal May 2004
Overexpression and Mislocalization of the Chromosomal Segregation Protein Separase in Multiple Human Cancers journal April 2009
Crystal structure of gingipain R: an Arg-specific bacterial cysteine proteinase with a caspase-like fold journal October 1999
Separase-dependent cleavage of pericentrin B is necessary and sufficient for centriole disengagement during mitosis journal July 2012
Critical Differences between Isoforms of Securin Reveal Mechanisms of Separase Regulation journal June 2013
Comparative Protein Modelling by Satisfaction of Spatial Restraints journal December 1993
Comparative Protein Structure Modeling Using Modeller journal September 2006
Regulation of Separase in Meiosis: Separase is Activated at the Metaphase I-II Transition in Xenopus Oocytes during Meiosis journal December 2005
The Jpred 3 secondary structure prediction server journal May 2008
Structural Determinants of MALT1 Protease Activity journal May 2012
Caspase Enzymology and Activation Mechanisms book January 2014
Securin can have a separase cleavage site by substitution mutations in the domain required for stabilization and inhibition of separase journal March 2006
Structure of the NLRP1 caspase recruitment domain suggests potential mechanisms for its association with procaspase-1: 2.0 Å Crystal Structure of the NLRP1 CARD journal April 2013
A Combinatorial Approach Defines Specificities of Members of the Caspase Family and Granzyme B: FUNCTIONAL RELATIONSHIPS ESTABLISHED FOR KEY MEDIATORS OF APOPTOSIS journal July 1997
Solution Structure of the RAIDD CARD and Model for CARD/CARD Interaction in Caspase-2 and Caspase-9 Recruitment journal July 1998
Domain structure of separase and its binding to securin as determined by EM journal May 2005
Cleavage of cohesin rings coordinates the separation of centrioles and chromatids journal July 2011
Crystal structure of the mucosa-associated lymphoid tissue lymphoma translocation 1 (MALT1) paracaspase region journal December 2011
A Novel Role of the Budding Yeast Separin Esp1 in Anaphase Spindle Elongation journal January 2001
Identification and Characterization of Separase Inhibitors (Sepins) for Cancer Therapy journal July 2014
GlobPlot: exploring protein sequences for globularity and disorder journal July 2003
Oncogenic activity of separase journal November 2008
HHblits: lightning-fast iterative protein sequence searching by HMM-HMM alignment journal December 2011
Studies on Substrate Recognition by the Budding Yeast Separase journal October 2003
The protein structures that shape caspase activity, specificity, activation and inhibition journal November 2004
Protein structure prediction on the Web: a case study using the Phyre server journal February 2009
Sister-chromatid separation at anaphase onset is promoted by cleavage of the cohesin subunit Scc1 journal July 1999
Mechanism and specificity of the human paracaspase MALT1 journal March 2012
Structural basis for executioner caspase recognition of P5 position in substrates journal September 2008
Cohesin Cleavage by Separase Required for Anaphase and Cytokinesis in Human Cells journal August 2001
Jalview Version 2--a multiple sequence alignment editor and analysis workbench journal January 2009
Structure Predictions and Interaction Studies Indicate Homology of Separase N-Terminal Regulatory Domains and Drosophila THR journal February 2004
Orchestrating anaphase and mitotic exit: separase cleavage and localization of Slk19 journal July 2001
Dual Inhibition of Sister Chromatid Separation at Metaphase journal December 2001
Plasticity of S2-S4 specificity pockets of executioner caspase-7 revealed by structural and kinetic analysis: Plasticity of caspase-7 specificity pockets journal August 2007
Kendrin Is a Novel Substrate for Separase Involved in the Licensing of Centriole Duplication journal May 2012
The Death Domain Superfamily in Intracellular Signaling of Apoptosis and Inflammation journal April 2007
Clan CD cysteine peptidases of parasitic protozoa journal April 2003
Protein secondary structure prediction based on position-specific scoring matrices 1 1Edited by G. Von Heijne journal September 1999
Centrosomal Aki1 and cohesin function in separase-regulated centriole disengagement journal November 2009

Cited By (6)

Separase: Function Beyond Cohesion Cleavage and an Emerging Oncogene: S EPARASE M ORE T HAN J UST a R ING O PENER journal January 2017
Protease dead separase inhibits chromosome segregation and RAB-11 vesicle trafficking journal September 2017
Biology and insights into the role of cohesin protease separase in human malignancies: Separase in human cancers journal February 2017
Cutting in the middleman: hidden substrates at the interface between proteases and plant development journal March 2017
Conservation of the separase regulatory domain journal January 2018
The Metabolism of Separase Inhibitor Sepin-1 in Human, Mouse, and Rat Liver Microsomes journal May 2018